JP3118579B2 - Pressure-resistant synthetic resin tube - Google Patents

Pressure-resistant synthetic resin tube

Info

Publication number
JP3118579B2
JP3118579B2 JP04352611A JP35261192A JP3118579B2 JP 3118579 B2 JP3118579 B2 JP 3118579B2 JP 04352611 A JP04352611 A JP 04352611A JP 35261192 A JP35261192 A JP 35261192A JP 3118579 B2 JP3118579 B2 JP 3118579B2
Authority
JP
Japan
Prior art keywords
wall
synthetic resin
metal
metal reinforcing
reinforcing strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP04352611A
Other languages
Japanese (ja)
Other versions
JPH06174154A (en
Inventor
史朗 金尾
Original Assignee
金尾 茂樹
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 金尾 茂樹 filed Critical 金尾 茂樹
Priority to JP04352611A priority Critical patent/JP3118579B2/en
Priority to US08/163,074 priority patent/US5390704A/en
Priority to KR1019930027109A priority patent/KR100301348B1/en
Publication of JPH06174154A publication Critical patent/JPH06174154A/en
Application granted granted Critical
Publication of JP3118579B2 publication Critical patent/JP3118579B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L11/00—Hoses, i.e. flexible pipes
    • F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
    • F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
    • F16L11/112—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall having reinforcements embedded in the wall

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】本発明は、主として地中に埋設し
て上下水道管・各種流体輸送管・暗渠管・電線保護管等
として用いられる内外圧に対する耐圧性に優れた合成樹
脂管であって、殊に上水道管や高圧流体輸送管に適した
管に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin pipe excellent in pressure resistance against internal and external pressures, which is mainly buried underground and used as water and sewage pipes, various fluid transport pipes, culvert pipes, electric wire protection pipes, and the like. More particularly, the present invention relates to a pipe suitable for a water supply pipe or a high-pressure fluid transport pipe.

【０００２】[0002]

【従来の技術】従来、合成樹脂管の耐圧偏平性能を高め
るために、金属帯板を断面Ｕ字形状にして合成樹脂管の
管壁の中に埋め込んだ管は、本出願人によって既に提案
しており、この出願は既に公開され一般にも知られるよ
うになっている。（例えば、実開昭６１−１４１８８９
号公報参照）2. Description of the Related Art Conventionally, a tube in which a metal strip is formed into a U-shaped cross section and embedded in the tube wall of a synthetic resin tube in order to enhance the pressure resistance flatness of the synthetic resin tube has been proposed by the present applicant. This application has already been published and is known to the public. (For example, Japanese Utility Model Laid-Open No. 61-141889)
No.)

【０００３】この既に公開されている合成樹脂管の管壁
の中に断面Ｕ字形とした金属帯板を埋め込んだ管は、耐
圧偏平性に優れた合成樹脂管として商品化され、既に各
方面で重用され広く使用されるに至っている。A tube in which a metal strip having a U-shaped cross section is embedded in the tube wall of this already disclosed synthetic resin tube has been commercialized as a synthetic resin tube having excellent flatness in pressure resistance. It has been widely used and widely used.

【０００４】しかしながら、このように管壁の中に断面
Ｕ字形とした金属補強帯板を埋め込んだ管であっても、
管の上面に３０００ｋｇ／ｍという高圧をかけて偏平強
度を試験した結果では、必ずしも満足できるものではな
いという問題点を有していることが判るに至った。即
ち、別紙図１０に示した構造の管Ｐ（合成樹脂素材＝ポ
リエチレン，管の外径８８０ｍｍ，内径８００ｍｍ，山
頂部２の内側の内管壁３の肉厚２ｍｍ，山頂部２の樹脂
の肉厚３ｍｍ，鉄板１の肉厚１ｍｍ，鉄板１の解放端部
分の間隔６１ｍｍ，資料Ｐの長さ１ｍの管）に外圧３０
００ｋｇ／ｍの荷重を掛けて耐圧偏平試験を行った結
果、無荷重状態（真円状態）からの変形量（沈み量）は
４４ｍｍとなり、管の横側部で鉄板１の解放端側の間隔
が開き、山頂部２の内側の内管壁３が管の軸線方向に開
き、その中には、この内管壁３の部分に亀裂が生じるこ
とがあるということを究明するに至った。また、同図に
示す山頂部２と山頂部２との間の谷部４には異常は認め
られなかった。[0004] However, even in such a pipe in which a metal reinforcing strip having a U-shaped cross section is embedded in the pipe wall,
The results of testing the flatness strength by applying a high pressure of 3000 kg / m to the upper surface of the tube have revealed that it has a problem that it is not always satisfactory. That is, a pipe P (synthetic resin material: polyethylene, outer diameter 880 mm, inner diameter 800 mm, wall thickness 2 mm of the inner pipe wall 3 inside the crest 2, resin wall of the crest 2) having the structure shown in FIG. 3 mm thick, 1 mm thick iron plate 1, 61 mm gap between open ends of iron plate 1, 1 m length of material P)
As a result of performing a pressure resistance flatness test under a load of 00 kg / m, the amount of deformation (sinking amount) from a no-load state (circular state) was 44 mm, and the gap between the open end side of the iron plate 1 and the side of the pipe. Opened, and the inner pipe wall 3 inside the crest 2 was opened in the axial direction of the pipe, and it was found that a part of the inner pipe wall 3 might be cracked therein. No abnormality was found in the valley 4 between the peaks 2 shown in FIG.

【０００５】[0005]

【発明が解決しようとする課題】本発明の目的は、この
ような管壁中に金属帯板を埋め込んだ合成樹脂管が有す
る問題点を解決することであり、このような問題点を有
しない高い耐圧偏平性能を有する合成樹脂管を提供しよ
うとするものである。SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of a synthetic resin pipe having a metal strip embedded in a pipe wall, and does not have such a problem. An object of the present invention is to provide a synthetic resin tube having high pressure resistance flatness performance.

【０００６】[0006]

【課題を解決するための手段】この課題を解決するため
に講じた本発明の第１の構成は、管壁（１）が略円筒状
の内壁（２）と螺旋状凹凸波形の外壁（３）とを有する
合成樹脂管であることを前提条件とし、このような合成
樹脂管において、内壁（２）と外壁（３）の凸波形部分
（４）との内部に、断面略Ｕ字状の金属補強帯板（５）
と、該金属補強帯板（５）の解放端部分（５ａ），（５
ｂ）側に位置していて該金属補強帯板（５）の解放端部
分（５ａ），（５ｂ）と係合する係合部（６ａ），（６
ｂ）を有する断面略コの字状の金属帯板（６）とが埋設
されている構成とすることによって、断面Ｕ字状の金属
補強帯板（５）が、その解放端側において開き変形する
ことを、該断面コの字状金属帯板（６）で規制し阻止す
ること、及び、金属補強帯板（５）にかかる外圧を金属
帯板（６）に受けさせることによって、より大きい外圧
に対抗させるようにしたものである。According to a first aspect of the present invention, which has been made to solve this problem, a tube wall (1) has a substantially cylindrical inner wall (2) and a spiral outer corrugated outer wall (3). ), And in such a synthetic resin tube, a substantially U-shaped cross section is formed inside the convex corrugated portion (4) of the inner wall (2) and the outer wall (3). Metal reinforced strip (5)
Open end portions (5a), (5) of the metal reinforcing strip (5).
b), the engaging portions (6a), (6) engaging with the open end portions (5a), (5b) of the metal reinforcing strip (5).
The metal reinforcing strip (5) having a U-shaped cross section is opened and deformed on its open end side by burying the metal strip (6) having a substantially U-shaped cross section having the shape (b). By restricting and preventing the metal strip (6) having a U-shaped cross section, and allowing the metal strip (6) to receive the external pressure applied to the metal reinforcing strip (5), It is designed to counter external pressure.

【０００７】また、本発明の第２の構成は、内壁（２）
と外壁（３）の凸波形部分（４）との内部に埋設させる
金属板の構成を、断面形状が略Ｕ字状であってその解放
端部分（５ａ），（５ｂ）が横方向外側または内側に向
かって折り曲げられた突出縁部分（５０ａ），（５０
ｂ）を有している形状としてある金属補強帯板（５）
と、平帯状の金属帯板（６）とを用いたものであって、
該平帯状の金属帯板（６）を前記金属補強帯板（５）の
解放端部分（５ａ），（５ｂ）側に位置させて解放端部
分（５ａ），（５ｂ）間を繋ぎ、その両端部分（６０
ａ），（６０ｂ）が前記金属補強帯板（５）の突出縁部
分（５０ａ），（５０ｂ）と重合するようにし、かつ、
当該重合面を互いに接着させてある構成とすることによ
って、断面Ｕ字状の金属補強帯板（５）が、その解放端
側において開き変形することを、該平帯状の金属帯板
（６）の接着力で規制し阻止すること、及び、金属補強
帯板（５）にかかる外圧を突出縁部分（５０ａ），（５
０ｂ）を介して金属帯板（６）に受けさせることによっ
て、より大きい外圧に対抗させるようにしたものであ
る。[0007] A second configuration of the present invention relates to an inner wall (2).
The structure of the metal plate embedded in the inside of the convex corrugated portion (4) of the outer wall (3) is substantially U-shaped, and the open end portions (5a) and (5b) of the metal plate are laterally outward or The protruding edge portions (50a), (50
metal reinforced strip (5) in the shape having b)
And a flat band-shaped metal band plate (6),
The flat metal strip (6) is positioned on the open end portions (5a) and (5b) of the metal reinforcing strip (5) to connect the open end portions (5a) and (5b). Both ends (60
a) and (60b) overlap with the protruding edge portions (50a) and (50b) of the metal reinforcing strip (5), and
By making the superposed surfaces adhere to each other, the flat metal strip (6) prevents the metal reinforcing strip (5) having a U-shaped cross section from opening and deforming at its open end side. And the external pressure applied to the metal reinforcing strip (5) is projected by the protruding edge portions (50a), (5).
Ob) is applied to the metal strip (6) so as to oppose a larger external pressure.

【０００８】本発明にいう合成樹脂管Ｐを形成する合成
樹脂素材は、管径と耐圧性を考慮して任意の幅と厚さと
をもつように帯状に形成されたポリエチレンやポリ塩化
ビニール・ポリプロピレンその他任意の合成樹脂素材が
選択使用される。また、金属補強帯板（５）及び金属板
（６）としては、所要幅に裁断された厚さ０．２ｍｍ〜
２．０ｍｍ厚の鉄板・スチール鋼板・ステンレス鋼板等
が選択使用される。The synthetic resin material for forming the synthetic resin pipe P referred to in the present invention is made of polyethylene, polyvinyl chloride, polypropylene, or the like, which is formed into a strip having an arbitrary width and thickness in consideration of the pipe diameter and pressure resistance. Other arbitrary synthetic resin materials are selectively used. The metal reinforcing strip (5) and the metal plate (6) each have a thickness of 0.2 mm or more cut to a required width.
A 2.0 mm-thick iron plate, steel plate, stainless steel plate or the like is selectively used.

【０００９】本発明を実施するに当たっては、使用する
金属補強帯板（５）や金属帯板（６）を、必要に応じて
予めその全周面または片面若しくは表裏の全面に合成樹
脂または樹脂塗料で被覆してある素材を用いたり、外壁
（３）の外周部を別の合成樹脂素材（８）によって略円
筒状に形成してあるものとして実施することができる。
また、金属板に樹脂材で被覆させてあるものにあって
は、被覆樹脂材を加熱熔融することによって、金属板ど
うし及び管形状樹脂材と接着させてある管を得ることが
できる。In practicing the present invention, a metal reinforcing strip (5) or a metal strip (6) to be used is coated with a synthetic resin or a resin coating on the entire peripheral surface or one surface or the entire front and back surfaces as necessary. The outer wall (3) may be formed in a substantially cylindrical shape by using another synthetic resin material (8).
Further, in the case where the metal plate is coated with a resin material, the coated resin material is heated and melted to obtain a pipe which is bonded to the metal plates and the tube-shaped resin material.

【００１０】[0010]

【作用】このような構成とした本発明の第１の構成の合
成樹脂管は、管に外部から大きな圧力が作用しても、断
面略Ｕ字状とした金属補強帯板（５）の解放端部分（５
ａ），（５ｂ）に、係合部（６ａ），（６ｂ）を係合さ
せてある断面略コの字状の金属帯板（６）によって、Ｕ
字状金属補強帯板（５）がその解放端部分（５ａ），
（５ｂ）側において開き変形することを規制し阻止し、
金属補強帯板（５）にかかる外圧を受けとめ、同時に、
このコの字状金属帯板（６）自身が管の内圧に対しても
対抗し、管壁（１）における凸波形部分（４）の内側に
位置する内壁（２）部分の伸び変形を阻止する。According to the first aspect of the present invention, even if a large external pressure is applied to the pipe, the metal reinforcing strip (5) having a substantially U-shaped cross section is released. End part (5
a) and (5b), a metal band plate (6) having a substantially U-shaped cross section in which the engaging portions (6a) and (6b) are engaged.
The metal reinforcing strip (5) has its open end portion (5a),
(5b) restricting and preventing the opening deformation on the side,
Receiving the external pressure applied to the metal reinforcing strip (5),
The U-shaped metal strip (6) itself resists the internal pressure of the tube, and prevents the inner wall (2) located inside the convex corrugated portion (4) on the tube wall (1) from elongating and deforming. I do.

【００１１】また、本発明の第２の構成の合成樹脂管
は、管に外部から大きな圧力が作用しても、金属補強帯
板（５）の解放端部分（５ａ），（５ｂ）側において突
出縁部分（５０ａ），（５０ｂ）を重合し接着させてあ
る平帯状の金属帯板（６）によって、金属補強帯板
（５）がその解放端部分（５ａ），（５ｂ）側において
開き変形することを両金属板の面接着によって規制し阻
止し、金属補強帯板（５）にかかる外圧を受けとめさ
せ、同時に、この平帯状の金属帯板（６）自身が管の内
圧に対しても対抗し、管壁（１）における凸波形部分
（４）の内側に位置する内壁（２）部分の伸び変形を阻
止する。Further, in the synthetic resin pipe having the second structure of the present invention, even if a large pressure acts on the pipe from the outside, the open ends (5a) and (5b) of the metal reinforcing strip (5) are provided. The metal reinforcing strip (5) is opened at the open end portions (5a) and (5b) side by the flat strip-shaped metal strip (6) in which the protruding edge portions (50a) and (50b) are overlapped and bonded. Deformation is regulated and prevented by the surface bonding of the two metal plates, and the external pressure applied to the metal reinforcing strip (5) is received, and at the same time, the flat strip-shaped metal strip (6) itself is responsive to the internal pressure of the pipe. To prevent the inner wall (2) located inside the convex corrugated portion (4) in the tube wall (1) from being stretched and deformed.

【００１２】[0012]

【実施例】次に、本発明の実施例について、添付の図面
に基づいて説明する。図１乃至図７は第１発明の実施例
を示し、図１乃至図３はその第１実施例を示した図であ
って、図１は合成樹脂管Ｐの一部を破断した外形を示し
た図であり、図２は管壁１部分の構造を分かり易く示し
た断面図である。図３は管Ｐの製造手段を示した分解説
明図である。Next, an embodiment of the present invention will be described with reference to the accompanying drawings. 1 to 7 show an embodiment of the first invention, and FIGS. 1 to 3 show the first embodiment. FIG. 1 shows an outer shape of a part of a synthetic resin pipe P cut away. FIG. 2 is a sectional view showing the structure of the tube wall 1 in an easily understandable manner. FIG. 3 is an exploded explanatory view showing the means for manufacturing the pipe P.

【００１３】該実施例に示した合成樹脂管Ｐの構造は、
図２に見られるように、管壁（１）の形状を、略直線円
筒状の内壁（２）と、断面半円弧状の螺旋状の凸波形状
に形成した外壁（３）とを有する合成樹脂管であって、
内壁（２）と外壁（３）の凸波形部分（４）とで形成さ
れた空洞部（７）の内周面に沿って、断面半円弧状とし
その両端縁部分（５ａ），（５ｂ）を横外側に向けて折
り曲げ突出させて断面形状を略Ｕ字状とした金属補強帯
板（５）と、該金属補強帯板（５）の解放両端縁部分
（５ａ），（５ｂ）側に位置し、中央部分が平坦な平帯
状で両端縁部分を上方に向かって折り曲げて断面形状を
コの字形とした金属帯板（６）とが、それぞれ上下に向
かい合って配置され、このコの字形金属帯板（６）の折
り曲げられた両端の係合部（６ａ），（６ｂ）が、前記
金属補強帯板（５）における両端縁部分（５ａ），（５
ｂ）の上面に折り重ねられて、該金属補強帯板（５）に
おける解放側の両端縁部分（５ａ），（５ｂ）と係合
し、挟持固定されている構造として埋設させてある。The structure of the synthetic resin pipe P shown in the embodiment is as follows.
As shown in FIG. 2, a composite having a tube wall (1) having a substantially straight cylindrical inner wall (2) and a helical convex wave shape having a semicircular arc cross section is formed. A resin tube,
A semicircular cross section is formed along the inner peripheral surface of the cavity (7) formed by the convex corrugated portion (4) of the inner wall (2) and the outer wall (3), and both end edge portions (5a), (5b) And a metal reinforcing strip (5) having a substantially U-shaped cross-section by bending and protruding outward and laterally outwardly at both ends (5a) and (5b) of the metal reinforcing strip (5). And metal strips (6) whose central portions are flat and flat at both end portions and whose both end portions are bent upward to form a U-shaped cross section. The bent engagement portions (6a) and (6b) at both ends of the metal strip (6) are connected to both edge portions (5a) and (5) of the metal reinforcing strip (5).
The metal reinforcing strip (5) is folded over on the upper surface of the metal reinforcing strip (5), and is engaged with the open side edges (5a) and (5b) of the metal reinforcing strip (5), and is embedded as a structure that is clamped and fixed.

【００１４】該実施例の管Ｐは、図３に見られるよう
に、金属補強帯板５にあっては、所要幅の平帯状の鉄板
を、管の形成前に予め、中央部分（５ｃ）を下向き解放
の半円弧状とし、その両端縁部分（５ａ），（５ｂ）を
それぞれ横外側に向って折り曲げてある形の断面略Ｕ字
形に加工形成したもの、金属帯板（６）は、中央部分
（６ｃ）が平帯状でその両端係合部（６ａ），（６ｂ）
を上方に向かって折り曲げた形の断面コの字形に加工形
成したものを用いる。As shown in FIG. 3, the pipe P of the present embodiment has a flat metal plate having a required width and is formed in a central portion (5c) before forming the pipe. Is formed into a semicircular arc that is open downward, and both end edge portions (5a) and (5b) are formed into a substantially U-shaped cross section that is bent toward the lateral outside, respectively. The central portion (6c) has a flat band shape and its both end engaging portions (6a), (6b)
Is formed into a U-shaped cross-section by bending upward.

【００１５】而して、該合成樹脂管Ｐを製造する手段に
ついて例示すると、図３に示したように、 ｉ，樹脂押出機（図外）から押し出すか、または、予め
押し出し形成しておいた内壁（２）形成用の平帯状の樹
脂帯（２Ａ）を管形成装置（図外）の上に螺旋状に巻回
させ、先に巻回した帯（２Ａ）の右側端縁部分（２ｂ）
の上に次に巻回する帯（２Ａ）の左側端縁部分（２ａ）
を重ね合わせて融着または接着連結しながら、順次円筒
状の内壁（２）を形成すること ｉｉ，この端縁（２ｂ），（２ａ）どうしの連結部の外
周面上に、前記断面コの字形の鉄板製金属帯板（６）
を、樹脂帯（２Ａ）と同一ピッチで螺旋状に巻回するこ
と ｉｉｉ，前記断面Ｕ字形の金属補強帯板（５）を、その
両端縁部分（５ａ），（５ｂ）をコの字形金属帯板
（６）の外周面上に当てつけながら、同金属帯板（６）
の上に螺旋状に巻回すること ｉｖ，このようにした後、コの字形金属帯板（６）の両
端の係合部（６ａ），（６ｂ）を、それぞれ該金属補強
帯板（５）における両端縁部分（５ａ），（５ｂ）の上
面に折り曲げて重ね合わせて係合固定させること ｖ，その後に、樹脂押出機（図外）から押し出すか、ま
たは、予め押し出し形成しておいた外壁（３）形成用の
平帯状の、または、前記金属補強帯板（５）と相似形と
した樹脂帯（３Ａ）を金属補強帯板（５）の上に、これ
を覆うようにして螺旋状に巻回させ、その左側端縁部分
（３ａ）を先に巻回した帯（３Ａ）の右側端縁部分（３
ｂ）の上に重ね合わせて融着または接着連結すると同時
に、内壁（２）とも融着または接着連結しながら、順次
螺旋凹凸状の外壁（３）を形成することを、それぞれ位
置をずらせて、同時的に順次繰り返しながら、図２に示
した構造の合成樹脂管Ｐを形成する。The means for producing the synthetic resin pipe P is exemplified by: i, extruded from a resin extruder (not shown), or extruded in advance, as shown in FIG. A flat belt-shaped resin band (2A) for forming the inner wall (2) is spirally wound on a tube forming device (not shown), and a right edge portion (2b) of the previously wound band (2A).
Edge portion (2a) of band (2A) to be wound next on
, And sequentially forming a cylindrical inner wall (2) while fusing or adhesively connecting them. Ii. On the outer peripheral surface of the connecting portion between the edges (2b) and (2a), -Shaped metal plate made of iron plate (6)
Is wound spirally at the same pitch as the resin strip (2A). Iii. The metal reinforcing strip (5) having a U-shaped cross section is formed by cutting both end portions (5a) and (5b) into a U-shaped metal. While being applied to the outer peripheral surface of the strip (6), the same metal strip (6)
Iv, after this, the engaging portions (6a) and (6b) at both ends of the U-shaped metal strip (6) are respectively connected to the metal reinforcing strip (5). ) Is bent over the upper surfaces of both end portions (5a) and (5b) to be engaged and fixed. V. Thereafter, it is extruded from a resin extruder (not shown) or extruded in advance. A resin band (3A) in a flat band shape for forming the outer wall (3) or similar to the metal reinforcing band plate (5) is spirally wound on the metal reinforcing band plate (5) so as to cover the metal band. Jo the spirally wound, the right edge portion (3 bands wound left edge portion thereof to (3a) above (3A)
b ) simultaneously forming an outer wall (3) having a helical uneven shape while overlapping or fusing or bonding with the inner wall (2) while simultaneously overlapping and fusing or bonding the inner wall (2), The synthetic resin pipe P having the structure shown in FIG. 2 is formed while being sequentially and simultaneously repeated.

【００１６】このようにすることよって、断面Ｕ字状の
金属補強帯板（５）が、その解放端側において開き変形
することを、断面コの字状の金属帯板（６）で規制し阻
止させ、金属補強帯（５）にかかる外圧を受け止めさ
せ、また、この金属帯板（６）によって管の内圧にも対
抗させ、同時に該金属帯板（６）の内面側の内壁
（２）、即ち、管壁（１）における凸波形部分（４）の
内側に位置する内壁（２）部分の伸び変形を阻止するよ
うにしたものである。In this manner, the metal reinforcing strip (5) having a U-shaped cross section is restricted by the metal strip (6) having a U-shaped cross section so that the metal reinforcing strip (5) is opened and deformed on the open end side. To prevent external pressure on the metal reinforcing band (5), and against the internal pressure of the pipe by the metal band plate (6), and at the same time, to the inner wall (2) on the inner surface side of the metal band plate (6). That is, the inner wall (2) located inside the convex corrugated portion (4) in the tube wall (1) is prevented from being elongated and deformed.

【００１７】このようにして製造した図２に示す構造の
管５０本について耐圧偏平試験をした。その結果は、次
の通りであった。管Ｐの長さ１ｍ、合成樹脂素材＝ポリ
エチレン，管の外径８８０ｍｍ，内径８００ｍｍ，凸波
形部分（４）の内側の内壁（２）の肉厚２ｍｍ，外壁
（３）の肉厚３ｍｍ，鉄板（５），（６）の肉厚１ｍ
ｍ，鉄板（５）の解放端部分の間隔６１ｍｍ，外圧５０
００ｋｇ／ｍ，無荷重状態（真円状態）からの変形量
（沈み量）平均４４ｍｍ，管の横側部で鉄板（５）の解
放端側の開き間隔０ｍｍ，凸波形部分（４）の内側の内
壁（２）の伸び０ｍｍであった。したがって、内壁
（２）部分の亀裂の発生は全く認められず、異常は認め
られなかった。A flat pressure test was conducted on 50 tubes manufactured in this manner and having the structure shown in FIG. The results were as follows. Pipe P length 1 m, synthetic resin material = polyethylene, pipe outer diameter 880 mm, inner diameter 800 mm, inner wall (2) thickness 2 mm inside convex corrugated portion (4), outer wall (3) thickness 3 mm, iron plate (5), 1m thickness of (6)
m, interval between the open ends of the iron plate (5): 61 mm, external pressure: 50
00 kg / m, average amount of deformation (sinking amount) from no load state (perfect circle state) 44 mm, open gap 0 mm on the open end side of the iron plate (5) at the side of the pipe, inside the convex corrugated part (4) Of the inner wall (2) was 0 mm. Therefore, no crack was found in the inner wall (2), and no abnormality was found.

【００１８】本発明にいう金属補強帯板（５）及び金属
帯板（６）は、鉄板やステンレス鋼板、スチール鋼板等
をそのまま使用してもよいが、鉄板の場合には錆を発生
し易いので亜鉛メッキや錫メッキを施したものが好まし
い。また、図面では、複雑さを避けるため省略したが、
帯板の片側面や表裏両面に、または全周面に、防錆用の
樹脂や塗料をコーティングしたり、管壁を形成する合成
樹脂材料と接着性のよい合成樹脂素材または樹脂塗料を
０．０１〜０．５ｍｍ程度の厚さに薄膜被覆したものを
使用してもよい。As the metal reinforcing strip (5) and the metal strip (6) according to the present invention, an iron plate, a stainless steel plate, a steel plate or the like may be used as it is, but in the case of an iron plate, rust is easily generated. Therefore, those plated with zinc or tin are preferable. Also, in the drawings, they are omitted to avoid complexity,
A resin or paint for rust prevention is coated on one side, both sides, or the entire peripheral surface of the band plate, or a synthetic resin material or resin paint having good adhesion to the synthetic resin material forming the tube wall is used. A thin film coated to a thickness of about 01 to 0.5 mm may be used.

【００１９】図４に示した合成樹脂管Ｐは、前記の製造
手段と同様の手段によって製造した第２実施例の管を示
したもので、金属補強帯板（５）の断面形状を断面Ｕ字
形の底部分が平らで角部分が略直角に折り曲げられてい
る形の断面略Ｕ字形で、その左右の解放両端縁部分（５
ａ），（５ｂ）を、前記第１実施例の場合と同様に、そ
れぞれ横外側に向けて折り曲げてある形状のものとし、
金属帯板（６）における両端の係合部（６ａ），（６
ｂ）を上方斜め中心側に向かって傾斜状に折り曲げた形
に形成して、金属補強帯板（５）の幅方向への広がり変
形を規制し阻止するようにしたものである。その他の点
は、前記第１実施例の場合と同様にしたものである。The synthetic resin pipe P shown in FIG. 4 shows the pipe of the second embodiment manufactured by the same means as the above-mentioned manufacturing means. It has a substantially U-shaped cross section in which the bottom portion of the character is flat and the corner portion is bent at substantially a right angle, and the open left and right end portions (5
a) and (5b) each have a shape bent outward and laterally, as in the case of the first embodiment.
The engagement portions (6a), (6) at both ends of the metal strip (6)
b) is formed so as to be bent obliquely toward the upper oblique center side so as to regulate and prevent the metal reinforcing strip (5) from expanding in the width direction and deforming. Other points are the same as those in the first embodiment.

【００２０】図５に示した第３実施例の合成樹脂管Ｐ
も、前記第１実施例に示した製造手段と同様の手段によ
って製造した管を示したもので、該実施例における金属
補強帯板（５）は、その断面形状を、断面Ｕ字形の底部
分が平らで角部分から対向する両脚部分がコップ状に広
がって解放端部分（５ａ）（５ｂ）に至る形の断面略Ｕ
字形のものとし、金属帯板（６）における両端の係合部
（６ａ），（６ｂ）を、このコップ状に広がっている両
解放端部分（５ａ），（５ｂ）に添わせて傾斜状に折り
曲げ形成し、金属補強帯板（５）の幅方向への広がり変
形を規制し阻止するようにしたものである。その他の点
は、前記第１実施例の場合と同様にしたものである。こ
のように、本発明にいう金属補強帯板（５）は、前記第
１，第２両実施例において示した構造のように、左右の
解放両端縁部分（５ａ），（５ｂ）を、横外側に向けて
折り曲げられていない形状としたのものであってもよ
い。The synthetic resin pipe P of the third embodiment shown in FIG.
This also shows a tube manufactured by the same means as the manufacturing means shown in the first embodiment, and the metal reinforcing strip (5) in this embodiment has a sectional shape of a U-shaped bottom portion. Are substantially U-shaped, and the opposite leg portions are spread in a cup shape from the corner portions to reach the open end portions (5a) (5b).
The engaging portions (6a) and (6b) at both ends of the metal strip (6) are inclined along the open end portions (5a) and (5b) extending in a cup shape. The metal reinforcing strip (5) is formed so as to restrict and prevent the metal reinforcing strip (5) from expanding in the width direction. Other points are the same as those in the first embodiment. Thus, the metal reinforcing strip (5) according to the present invention, as in the structure shown in the first and second embodiments, extends the left and right open end portions (5a) and (5b) horizontally. It may be a shape that is not bent outward.

【００２１】図６及び図７に示した実施例は、管Ｐにお
ける螺旋凹凸状とした外壁（３）の外周部を別の合成樹
脂素材（８）によって略円筒状に形成してある管につい
ての実施例を示したものであって、図６の第４実施例
は、前記図４の第２実施例に示した構造の管Ｐにおける
外壁（３）の外周部に別の合成樹脂素材（８）を被せ、
凸波形部分（４）の外周面部分の肉厚を薄くし、凸波形
部分（４）と凸波形部分（４）との間の部分の肉厚を厚
くし、外壁（３）と融着または接着して管Ｐの外周面を
略円筒状に形成したものである。The embodiment shown in FIGS. 6 and 7 relates to a tube in which the outer peripheral portion of the spirally uneven outer wall (3) of the tube P is formed in a substantially cylindrical shape by another synthetic resin material (8). The fourth embodiment shown in FIG. 6 is different from the second embodiment shown in FIG. 4 in that the outer peripheral portion of the outer wall (3) of the pipe P having the structure shown in the second embodiment in FIG. 8)
The thickness of the outer peripheral surface portion of the convex corrugated portion (4) is reduced, the thickness of the portion between the convex corrugated portion (4) and the convex corrugated portion (4) is increased, and the outer wall (3) is fused or fused. The outer peripheral surface of the pipe P is formed into a substantially cylindrical shape by bonding.

【００２２】図７に示した第５実施例の管Ｐは、前記図
５の第３実施例に示した構造の管Ｐにおいて、外壁
（３）の外周部に略均等肉厚の別の合成樹脂素材（８）
を被せ、外壁（３）と融着または接着して管Ｐの外周面
を略円筒状に形成したものである。ただし、これらの場
合、被覆した合成樹脂素材（８）と外壁（３）とは、必
ずしも融着または接着している必要はなく、非接着状態
のものであってもよい。The pipe P of the fifth embodiment shown in FIG. 7 is different from the pipe P of the structure shown in the third embodiment of FIG. Resin material (8)
And the outer peripheral surface of the pipe P is formed into a substantially cylindrical shape by fusing or bonding with the outer wall (3). However, in these cases, the coated synthetic resin material (8) and the outer wall (3) do not necessarily need to be fused or bonded, and may be in a non-bonded state.

【００２３】図８及び図９は第２発明についての実施例
を示した図である。該実施例に示した合成樹脂管Ｐの構
造は、図８に見られるように、管壁（１）の形状を、前
記第１実施例に示した管と同様に、略直線円筒状の内壁
（２）と、断面半円弧状の螺旋状の凸波形状に形成した
外壁（３）とを有する合成樹脂管であって、内壁（２）
と外壁（３）の凸波形部分（４）とで形成された空洞部
（７）の内周面に沿って、断面半円弧状としその開放端
部分（５ａ），（５ｂ）をそれぞれ横外側に向けて折り
曲げ突出させて突出縁部分（５０ａ），（５０ｂ）を形
成した金属補強帯板（５）と、該金属補強帯板（５）の
解放端部分（５ａ），（５ｂ）側に位置して、全体が平
坦な平帯状の金属帯板（６）が配置され、この平帯状金
属帯板（６）の両端部分（６０ａ），（６０ｂ）が、前
記金属補強帯板（５）における横突出端縁部分（５０
ａ），（５０ｂ）と互いに重ねられ、これら両金属板
（５），（６）に被覆された被膜どうしが加熱熔融され
て当該重合面が相互に接着固定されている構造として埋
設されている。FIGS. 8 and 9 show an embodiment of the second invention. As shown in FIG. 8, the structure of the synthetic resin pipe P shown in this embodiment is such that the shape of the pipe wall (1) is substantially the same as that of the pipe shown in the first embodiment. (2) a synthetic resin tube having an outer wall (3) formed in a spiral convex wave shape having a semicircular cross section, wherein the inner wall (2)
A semicircular cross section is formed along the inner peripheral surface of the cavity (7) formed by the convex corrugated portion (4) of the outer wall (3), and the open end portions (5a) and (5b) are laterally outward. And a metal reinforcing strip (5) formed with protruding edge portions (50a) and (50b) by being bent and protruding toward the open end portions (5a) and (5b) of the metal reinforcing strip (5). The flat metal strip (6), which is flat as a whole, is disposed, and both ends (60a) and (60b) of the flat metal strip (6) are connected to the metal reinforcing strip (5). Side protruding edge portion (50
a) and (50b) are superimposed on each other, and the coatings coated on both of the metal plates (5) and (6) are heated and melted and buried as a structure in which the superposed surfaces are bonded and fixed to each other. .

【００２４】而して、該合成樹脂管Ｐを製造する手段に
ついては、図９に示したように、ｉ，前記第１実施例の
場合と同様にして、平帯状の樹脂帯（２Ａ）を用いて円
筒状の内壁（２）を形成する。ｉｉ，その外周面上に、
前記平帯状の金属帯板（６）を加熱して、その外周面に
被覆形成されている樹脂皮膜（図省略）を熔融させて前
記樹脂帯（２Ａ）と同一ピッチで螺旋状に巻回し、内壁
（２）と接着させる。ｉｉｉ，前記断面Ｕ字形の金属補
強帯板（５）を加熱して、その外表面を被覆形成した樹
脂被膜（図省略）を熔融させて、その突出縁部分（５０
ａ），（５０ｂ）を金属帯板（６）両端部分（６０
ａ），（６０ｂ）の外周面上に当てつけて重ね合わせな
がら、同金属帯板（６）の上に螺旋状に巻回して接当面
どうしを接着させる。ｉｖ，その後に、外壁（３）形成
用の平帯状の樹脂帯（３Ａ）を金属補強帯板（５）の上
に、これを覆うようにして螺旋状に巻回させて金属製補
強帯板（５）と接着させ、同時に、内壁（２）とも融着
または接着連結しながら、順次螺旋凹凸状の外壁（３）
を形成するのである。As shown in FIG. 9, the means for manufacturing the synthetic resin pipe P is, as shown in FIG. 9, in the same manner as in the first embodiment. To form a cylindrical inner wall (2). ii, on its outer peripheral surface,
The flat strip-shaped metal strip (6) is heated to melt a resin film (not shown) formed on the outer peripheral surface thereof and spirally wound at the same pitch as the resin strip (2A). Adhere to inner wall (2). iii, the metal reinforcing strip (5) having a U-shaped cross section is heated to melt a resin film (not shown) formed on the outer surface of the metal reinforcing strip (5).
a) and (50b) are replaced at both ends (60) of the metal strip (6).
a) While being overlapped with the outer peripheral surface of (60b), the spirally wound around the same metal strip (6) is adhered to the contact surfaces. iv. Thereafter, a flat strip-shaped resin strip (3A) for forming the outer wall (3) is spirally wound on the metal reinforcing strip (5) so as to cover the metal reinforcing strip (5). (5), and at the same time, the outer wall (3) having a spiral uneven shape while being fused or bonded to the inner wall (2).
Is formed.

【００２５】このようにすることよって、断面Ｕ字状の
金属補強帯板（５）が、その解放端側において開き変形
することを、平帯状の金属帯板（６）との面接着力によ
って規制し阻止させ、金属補強帯板（５）にかかる外圧
を受け止めさせ、また、この金属帯板（６）によって管
の内圧にも対抗させ、同時に該金属帯板（６）の内面側
の内壁（２）、即ち、空洞部（７）の内側の内壁（２）
部分の伸び変形を阻止させる。In this way, the metal reinforcing strip (5) having a U-shaped cross section is prevented from being opened and deformed on its open end side by the surface adhesive force with the flat strip-shaped metal strip (6). To prevent external pressure applied to the metal reinforcing strip (5), and to counter the internal pressure of the pipe by the metal strip (6), and at the same time, to the inner wall (5) of the metal strip (6) on the inner surface side. 2), that is, the inner wall (2) inside the cavity (7)
Prevents elongation deformation of the part.

【００２６】このようにして製造した図８に示す構造の
管５０本について、前記第１実施例における管と同様に
耐圧偏平試験をした。その結果は、次の通りであった。
管Ｐの長さ１ｍ、合成樹脂素材＝ポリエチレン，管の外
径８８０ｍｍ，内径８００ｍｍ，凸波形部分（４）の内
側の内壁（２）の肉厚２ｍｍ，外壁（３）の肉厚３ｍ
ｍ，鉄板（５），（６）の肉厚１ｍｍ，鉄板（５）の解
放端部分の間隔６１ｍｍ，外圧５０００ｋｇ／ｍ，無荷
重状態（真円状態）からの変形量（沈み量）平均４４ｍ
ｍ，管の横側部で鉄板（５）の解放端側の開き間隔０ｍ
ｍ，凸波形部分（４）の内側の内壁（２）の伸び０ｍｍ
であった。したがって、この管Ｐにあっても、前記第１
実施例の管の場合と同様に、内壁（２）部分の亀裂の発
生は全く認められず、異常は認められなかった。With respect to the 50 tubes manufactured as described above and having the structure shown in FIG. 8, a flat pressure-resistant test was conducted in the same manner as the tube in the first embodiment. The results were as follows.
Length of pipe P is 1 m, synthetic resin material is polyethylene, outer diameter of pipe is 880 mm, inner diameter is 800 mm, thickness of inner wall (2) inside convex wavy portion (4) is 2 mm, thickness of outer wall (3) is 3 m
m, the thickness of the iron plates (5) and (6) is 1 mm, the interval between the open ends of the iron plates (5) is 61 mm, the external pressure is 5000 kg / m, and the average deformation amount (sinking amount) from no load state (perfect circle state) is 44 m.
m, opening distance 0m on the open end side of the iron plate (5) at the side of the pipe
m, elongation of the inner wall (2) inside the convex corrugated portion (4) is 0 mm
Met. Therefore, even in this pipe P, the first
As in the case of the tube of the example, no crack was found in the inner wall (2), and no abnormality was found.

【００２７】該実施例の変形構造として、図面は省略す
るが、金属補強帯板（５）の横外方に向けて突出形成し
た突出縁部分（６０ａ），（６０ｂ）を、Ｕ字部分の下
方に位置するように開放端部分（６ａ），（６ｂ）から
内方向に向けて折り曲げ形成したものとして実施しても
よい。As a modified structure of this embodiment, although not shown in the drawings, the protruding edge portions (60a) and (60b) protruding outward and laterally of the metal reinforcing strip (5) are replaced with U-shaped portions. It may be embodied as being bent inward from the open end portions (6a) and (6b) so as to be located below.

【００２８】金属補強帯板（５）及び金属帯板（６）の
素材等及び金属補強板（５）のＵ字形部分の変形例等に
ついては、第１発明の場合と同様に種々の素材及び変形
形状として実施してもよいことは言うまでもない。As to the material of the metal reinforcing strip (5) and the metal strip (6) and the modification of the U-shaped part of the metal reinforcing plate (5), various materials and the same as in the first invention. Needless to say, it may be implemented as a deformed shape.

【００２９】本発明にいう管壁を形成する合成樹脂素材
の硬度は、製造する管によって任意の硬度のものを選定
使用することができる。外壁（３）を形成する樹脂素材
は、金属補強帯板（５）の保護のため硬いものであるこ
とが好ましいが、内壁（２）を形成する樹脂素材は、管
内を流通させる物質の種類や性質によって、軟質の素材
とか、耐摩耗性の素材とか、耐薬品性の素材とかを任意
に選択使用することができる。また、本発明によって製
造した管を暗渠管として使用する場合には、凸波形部分
（４）と凸波形部分（４）との間の谷部分に集水用の小
孔を穿設形成すればよい。The hardness of the synthetic resin material forming the pipe wall according to the present invention can be selected and used depending on the pipe to be manufactured. The resin material forming the outer wall (3) is preferably hard for protection of the metal reinforcing strip (5). However, the resin material forming the inner wall (2) may vary depending on the type of material flowing through the pipe. Depending on the properties, a soft material, a wear-resistant material, or a chemical-resistant material can be arbitrarily selected and used. When the pipe manufactured according to the present invention is used as a culvert pipe, a small hole for collecting water may be formed in a valley between the convex corrugated portion (4) and the convex corrugated portion (4). Good.

【００３０】以上本発明の代表的と思われる実施例につ
いて説明したが、本発明は必ずしもこれらの実施例構造
のみに限定されるものではなく、本発明にいう前記の構
成要件を備え、かつ、本発明にいう目的を達成し、以下
にいう効果を有する範囲内において適宜改変して実施す
ることができるものである。The embodiments which are considered to be representative of the present invention have been described above. However, the present invention is not necessarily limited to the structures of the embodiments, but has the above-mentioned constitutional requirements according to the present invention, and The present invention achieves the object of the present invention and can be appropriately modified and implemented within the range having the following effects.

【００３１】[0031]

【発明の効果】本発明は以上説明したように、合成樹脂
管の耐圧性能を高めるために、第１発明にあたっては、
所要幅と所要高さをもつ断面略Ｕ字形とした金属補強帯
板の他に、断面略コの字状とした金属帯板を用い、この
断面コの字状の金属帯板によって、断面略Ｕ字状とした
金属補強帯板の解放端部分に係合させ、金属補強帯板が
その解放端側において開き変形することを規制するとと
もに阻止させ、金属補強帯板にかかる外圧を金属帯板に
うけさせるようにしたものであるから、極めて耐圧性能
に優れた合成樹脂管を得ることができるに至ったのであ
る。As described above, according to the first aspect of the present invention, in order to improve the pressure resistance of a synthetic resin tube,
In addition to the metal reinforcing strip having a required width and height and having a substantially U-shaped cross section, a metal strip having a substantially U-shaped cross section is used. The metal reinforcing strip is engaged with the open end portion of the U-shaped metal reinforcing strip to restrict and prevent the metal reinforcing strip from being opened and deformed at the open end side, thereby preventing external pressure applied to the metal reinforcing strip from being applied to the metal strip. Therefore, a synthetic resin tube having extremely excellent pressure resistance performance can be obtained.

【００３２】また、該コの字状金属帯板は、金属補強帯
板の変形を規制し阻止し、外圧に対して対応させるだけ
でなく、同時に、このコの字状金属帯板自身が管の内圧
に対しても対抗し、管壁における凸波形部分の内側の内
壁部分の変形を阻止する作用をも期待することができる
ものであるから、この内壁部分の形成素材には、強度上
の制限が緩和されるので、管内を流通させる物質の種類
や性質によって、耐摩耗性・耐薬品性・耐油性等に優れ
た任意の素材を選択使用することができるという顕著な
効果をも期待することができるに至ったのである。The U-shaped metal strip not only controls and prevents the deformation of the metal reinforcing strip and responds to external pressure, but at the same time, the U-shaped metal strip itself is a tube. It can also be expected to act against the internal pressure of the tube wall and to prevent the deformation of the inner wall portion inside the convex corrugated portion on the tube wall. Since the restrictions are relaxed, it is also expected to have a remarkable effect that any material excellent in wear resistance, chemical resistance, oil resistance, etc. can be selected and used depending on the type and properties of the substance flowing in the pipe. We can do it.

【００３３】第２発明の管にあっては、断面略Ｕ字形と
した金属補強帯板をその解放端側において横外方または
横内方に向かって折り曲げられた突出縁部分をもつ形状
のものとし、他方の金属帯板として平帯状のものを用
い、金属補強帯板における突出縁部分と金属帯板の両端
部分とを重ね合わせて互いに接着させることによって、
金属補強帯板が解放端側において開き変形することを規
制し阻止させ、同時に、金属補強帯板にかかる外圧を金
属帯板に受けさせるようにしたものであるから、前記第
１発明における管と同様の効果を期待することができる
のである。In the pipe according to the second aspect of the invention, the metal reinforcing strip having a substantially U-shaped cross section has a protruding edge portion bent outward or inward in the open end side. By using a flat strip as the other metal strip, by overlapping the protruding edge portion of the metal reinforcing strip and both end portions of the metal strip, and bonding them together,
The metal reinforcing strip is restricted and prevented from opening and deforming on the open end side, and at the same time, the external pressure applied to the metal reinforcing strip is received by the metal strip. Similar effects can be expected.

【図面の簡単な説明】[Brief description of the drawings]

【図１】第１発明の第１実施例を示す管の一部切欠き正
面図。FIG. 1 is a partially cutaway front view of a pipe showing a first embodiment of the first invention.

【図２】同管の管壁部分の構造を示す断面図。FIG. 2 is a sectional view showing a structure of a pipe wall portion of the pipe.

【図３】製造手段を説明するための分解断面図。FIG. 3 is an exploded cross-sectional view for explaining manufacturing means.

【図４】第２実施例を示す管壁部分の断面図。FIG. 4 is a sectional view of a tube wall portion showing a second embodiment.

【図５】第３実施例を示す管壁部分の断面図。FIG. 5 is a sectional view of a tube wall portion showing a third embodiment.

【図６】第４実施例を示す管壁部分の断面図。FIG. 6 is a sectional view of a tube wall showing a fourth embodiment.

【図７】第５実施例を示す管壁部分の断面図。FIG. 7 is a sectional view of a tube wall showing a fifth embodiment.

【図８】第２発明の管壁部分の構造を示す断面図。FIG. 8 is a sectional view showing a structure of a tube wall portion according to the second invention.

【図９】同製造手段を説明するための分解断面図。FIG. 9 is an exploded cross-sectional view for explaining the manufacturing means.

【図１０】従来の管の管壁部分の構造を示す断面図。FIG. 10 is a sectional view showing a structure of a tube wall portion of a conventional tube.

【符号の説明】[Explanation of symbols]

（１）管壁 （２） 内壁 （３） 外壁 （４） 凸波形部分 （５） 金属補強帯板 （５ａ），（５ｂ） 解放端部分 （６） 金属帯板 （６ａ），（６ｂ） 係合部 （５０ａ），（５０ｂ） 突出縁部分 （６０ａ），（６０ｂ） 端部分 (1) Pipe wall (2) Inner wall (3) Outer wall (4) Convex corrugated part (5) Metal reinforcing strip (5a), (5b) Open end part (6) Metal strip (6a), (6b) Joint part (50a), (50b) Projecting edge part (60a), (60b) End part

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】 管壁（１）が略円筒状の内壁（２）と螺
旋状の凹凸波形状に形成されている外壁（３）とを有す
る合成樹脂管であって、内壁（２）と外壁（３）の凸波
形部分（４）との内部に、断面略Ｕ字状の金属補強帯板
（５）と、該金属補強帯板（５）の解放端部分（５
ａ），（５ｂ）側に位置して該金属補強帯板（５）の解
放端部分（５ａ），（５ｂ）と係合する係合部（６
ａ），（６ｂ）を有する断面略コの字状の金属帯板
（６）とが埋設されている耐圧合成樹脂管。1. A synthetic resin tube having a tube wall (1) having a substantially cylindrical inner wall (2) and an outer wall (3) formed in a helical uneven wave shape, wherein the inner wall (2) Inside the convex corrugated portion (4) of the outer wall (3), a metal reinforcing strip (5) having a substantially U-shaped cross section and an open end portion (5) of the metal reinforcing strip (5).
a) and (5b), which are engaged with the open end portions (5a) and (5b) of the metal reinforcing strip (5).
a) A pressure-resistant synthetic resin tube in which a metal band plate (6) having a substantially U-shaped cross section having (6) is embedded. 【請求項２】 管壁（１）が略円筒状の内壁（２）と螺
旋状の凹凸波形状に形成されている外壁（３）とを有す
る合成樹脂管であって、内壁（２）と外壁（３）の凸波
形部分（４）との内部に、断面形状が略Ｕ字状であって
その解放端部分（５ａ），（５ｂ）が横方向外側または
内側に向かって折り曲げられた突出縁部分（５０ａ），
（５０ｂ）を有している形状の金属補強帯板（５）と、
該金属補強帯板（５）の解放端部分（５ａ），（５ｂ）
側に位置して解放端部分（５ａ），（５ｂ）間を繋ぎ、
両端部分（６０ａ），（６０ｂ）が前記金属補強帯板
（５）の突出縁部分（５０ａ），（５０ｂ）と重合し、
かつ、当該重合面が互いに接着している平帯状の金属帯
板（６）とが埋設されている耐圧合成樹脂管。2. A synthetic resin tube having a tube wall (1) having a substantially cylindrical inner wall (2) and an outer wall (3) formed in a helical uneven wave shape. A projection having a substantially U-shaped cross-section and open ends (5a) and (5b) of which are bent inward or outward in the horizontal direction, inside the outer wall (3) and the convex corrugated portion (4). Edge part (50a),
A metal reinforcing strip (5) having a shape having (50b);
Open end portions (5a), (5b) of the metal reinforcing strip (5)
Side and connects the open end portions (5a) and (5b),
Both end portions (60a) and (60b) overlap with the protruding edge portions (50a) and (50b) of the metal reinforcing strip (5),
A pressure-resistant synthetic resin tube in which a flat metal band plate (6) whose superposed surfaces are bonded to each other is embedded. 【請求項３】 外壁（３）の外周部が別の合成樹脂素材
（８）によって略円筒状に形成されている請求項１また
は２に記載の耐圧合成樹脂管。3. The pressure-resistant synthetic resin pipe according to claim 1, wherein the outer peripheral portion of the outer wall is formed in a substantially cylindrical shape by another synthetic resin material.
JP04352611A 1992-12-09 1992-12-09 Pressure-resistant synthetic resin tube Expired - Fee Related JP3118579B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP04352611A JP3118579B2 (en) 1992-12-09 1992-12-09 Pressure-resistant synthetic resin tube
US08/163,074 US5390704A (en) 1992-12-09 1993-12-08 Synthetic resin pipe including cylindrical inner wall and a spirally extending corrugated outer wall
KR1019930027109A KR100301348B1 (en) 1992-12-09 1993-12-09 Pressure Resistance Synthetic Resin Pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP04352611A JP3118579B2 (en) 1992-12-09 1992-12-09 Pressure-resistant synthetic resin tube

Publications (2)

Publication Number Publication Date
JPH06174154A JPH06174154A (en) 1994-06-24
JP3118579B2 true JP3118579B2 (en) 2000-12-18

Family

ID=18425232

Family Applications (1)

Application Number Title Priority Date Filing Date
JP04352611A Expired - Fee Related JP3118579B2 (en) 1992-12-09 1992-12-09 Pressure-resistant synthetic resin tube

Country Status (3)

Country Link
US (1) US5390704A (en)
JP (1) JP3118579B2 (en)
KR (1) KR100301348B1 (en)

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Also Published As

Publication number Publication date
JPH06174154A (en) 1994-06-24
KR100301348B1 (en) 2001-10-22
KR940015345A (en) 1994-07-20
US5390704A (en) 1995-02-21

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